# Questions Asked onJuly 8, 2010

1. ## science

how do ear defenders work

2. ## Algebra

Divide the rational expression. Express the quotient as a rational expression in lowest terms. (x^2+10x+21)/(x^2+11x+28) ÷ (x^2+3x)/(x^2+11x+28) (i really need to know the steps on how to do this (please just don't give me the answer i already know it)

3. ## Physics

1)When a car drives off a cliff, why does it rotate forward as it falls? (Consider the torque it experiences as it rolls off the cliff.) 2)The front wheels located far out in front of the racing vehicle help to keep the vehicle from nosing upward when it

4. ## chemistry

what is the percentage of water in Ba(OH)2 x 8H2O?

5. ## physics

A conducting sphere that carries a total charge of -6 micro-coulomb is placed at the center of a conducting spherical shell that carries a total charge of +1 micro-coulomb. The conductors are in elecctrostatic equilibrium. determine the charge on the OUTER

6. ## English

Mr. Firman invited his friend, Mr. Nulty, to come over and have dinner with him and Mrs. Stoner. The maid fixed a big dinner for the three of them, and when they were ready for dessert, she brought a cake out for Mr. Nulty because it was his fifty-ninth

7. ## chemistry

A rigid ball that contained 25.0 liters of air at 22°C and 6.25 atm pressure was placed in an oven at a temperature of What was the new pressure inside the ball

8. ## chemistry

How many grams of chlorine gas are present in a 150.0 liter cylinder of chlorine held at a pressure of 1.00 atm and

9. ## history -history teacher if poss

for my history homework i need to answer this question Explain why the Peace Settlement was changed in the years 1920-1928. ive looked but can`t find anything its due in tomorrow and i can`t find anything. please can someone help.

10. ## Physics

A car traveling at 10 m/s accelerates at 2.03 m/s2 for 11 seconds. To the nearest meter how far does it travel? To the nearest tenth of a m/s, what is the final velocity of the car in the previous problem?

11. ## Geometry

Which of the following is NOT a way you can show that triangles are similar? ________________________________________ A. AAA similarity B. SAS similarity C. SSA similarity D. SSS similarity

12. ## college chemistry

calculate the pressure exerted by 2.50 moles of CO2 confined in a volume of 5.00 L at 450K. Compare the pressure with that predicted by the ideal gas equation.

13. ## Physics

A merry-go-round has a mass of 1580 kg and a radius of 7.25m. How much net work is required to accelerate it from rest to a rotation rate of 1 revolution per 7.1s? Assume it is a solid cylinder.

14. ## accounting

On January 2, 2010, Wine Corporation wishes to issue \$2,000,000 (par value) of its 8%, 10-year bonds. The bonds pay interest annually on January 1. The current yield rate on such bonds is 10%. Using the interest factors below, compute the amount that Wine

15. ## physics

A child throws a snowball with horizontal velocity of 18m/s directly toward a tree, from a distance of 9.0m and a height above the ground of 1.5m. if the time interval is 0.50s, at what height above the ground will the snow ballhit the tree

16. ## algebra

use intrcepts to graph the equation x + 4y = 8

17. ## Physics

A German U2 rocket from the Second World War had a range of 300 km, reaching a maximum height of 100 km. Determine the rocket's maximum initial velocity.

18. ## Calculus/Physics

A stone is thrown from a cliff top with an upward velocity of 20 m/s. It takes 7 seconds for the stone to hit the ground at the bottom of the cliff. How high is the cliff? I know you use the equation of motion S(t)= (So)+(Vo)t-(1/2)gt^2 S(20)= (So) + 140 -

19. ## Chemisty

The solubility of sodium floride, NaF, is 4.06 g NaF/100 g H2O at 20ºC. What mass of NaF would you have to dissolve in 1000 g H2O to make a saturated solution?

20. ## physics

A particle of mass 86 g and charge 24 μC is released from rest when it is 67 cm from a second particle of charge −12 μC. Determine the magnitude of the initial ac- celeration of the 86 g particle.

21. ## geometry

If AC = 20 centimeters, and BC = 16 centimeters, which does AB equal?

22. ## geometry

Which of the following is NOT a way you can show that triangles are similar? A.AAA similarity B.SAS similarity C.SSA similarity D.SSS similarity

23. ## gcse history

why was the Peace Settlement changed in the years 1920-1928? thanks!

24. ## Chemistry

Name and give the symbol for each of the following: a)the element in period 3 group 2 = Magnesium = Mg b)the halogen in period 4 = Bromine = Br c)the element in period 6 and group 11 = Gold = Au d)the akali metal in period 2 = Lithium = Li e)the noble gas

25. ## Economics Homework

Use the Expenditure Equation for GDP (GDP = C + 1 + G + XN). Using your research skills, find the values for each sector for the years 1929 and 1933. Determine the percentage change for the two years. Explain the drastic change and what this meant for the

26. ## Physics

A car accelerates at a constant rate from zero to 36.8 m/s in 10 seconds and then slows to 13.9 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds?

27. ## chem

the solubility of lead(II) chloride, PbCl2, in water at 20 degrees Celcius is 1.00 g PbCl2/100 g of water. if you stirred 7.50 g PbCl2 in 400 g of water at 20 degrees Celcius, what mass of lead (II) chloride would remain undissolved?

28. ## Physics

I'm learning about Newton's Laws of Motions and I'm having trouble understanding these questions: "A rear-end collision between a soft-drink truck and a car occurs. The truck driver claims the car backed into him, while the auto driver claims that the

29. ## Math

Hi Drawing a diagram will help: A ladder 5m long leans against a wall, with the top of the ladder (B) reaching 4m up the wall and the foot of the ladder (A) is 3m from the wall (C). A man is at a point D which is 2m up the ladder.Point E lies on line AC

30. ## Physics

A car accelerates at a constant rate from zero to 36.8 m/s in 10 seconds and then slows to 13.9 m/s in 5 seconds. What is its average acceleration to the nearest tenth of a m/s2 during the 15 seconds? What was the acceleration during the first 10 seconds

31. ## college chemistry

calculate the pressure exerted by 1.00 moles of CO2 confined in a volume of 5.00 L at 450. K. Compare the pressure with that predicted by the ideal gas equation.

32. ## geometry

you are building a ramp that will be in the shape of a perfect right-angled triangle. The vertical height of th ramp will be 10 feet. the horizontal base of the ramp will be 15 feet. what will be the length of the downward sloping side of the ramp?

33. ## writing

1. Identify the thesis statement in the article “Essay: The Communication Collapse.” State specifically where the author placed his thesis statement. 2. Identify the arguments the author made to support his position. 3. Which argument was the most

34. ## Ms Sue -history

the treaty of versailles the league of nations . sorry i should have mentioned that.

35. ## accounting

Cooper Construction Company had a contract starting April 2010, to construct a \$9,000,000 building that is expected to be completed in September 2012, at an estimated cost of \$8,250,000. At the end of 2010, the costs to date were \$3,795,000 and the

36. ## Chemistry

Draw a Bohr diagram of the protons and electrons in each of the following. a) an atom of magnesium Do I draw this with 19 atoms surrounding the shell of Magnesium around?

37. ## Chemistry

When it says, " Draw a Lewis diagram for each of the following. " a)One atom of each of the elements in the second period. Is it asking me to draw a Lewis diagram for Lithium and Beryllium?

38. ## chemistry

The vitamin niacin can be isolated from liver, yeast, milk, and whole grain. Which source would be the best for a multivitamin tablet

39. ## CHEMISTRY

What is the molarity of 250 mL of a solution that contains 12.5 g of dissolved zinc bromide, ZnBr2?

40. ## chemistry

How many moles of water are contained in 160ml of water at 4'c?

41. ## math

The area of a rectangle is 24, and its diagonal is radical 52. Find its dimensions and perimeter. Longer side = ? Shorter side = ? Perimeter = ?

42. ## Algebra

Simplify the complex rational expression 3/(x+5)+ 6/(x+3) ÷ (3x+13)/(x^2+8x+15) (please show steps i already know the answer i need to know the steps)

43. ## Geometry

Congruent triangles have a relation. Which is not an equivalence relation? ________________________________________ A reflexive B symmetric C distributive D transitive

44. ## Math problems

solve- 7 x + 2 -- ---- 24 = 12 x over 3 = 224 over 720

45. ## US History II

What would this mean: identify the source of the quotation.

46. ## US History II

What would be one major turning point in US history for 1989? One website said it was: Dismantling of the Berlin Wall, the election of Solidarity in Poland, and the fall of the Eastern European economies signal the collapse of the Soviet Union But those

47. ## Chemistry

Draw a bohr diagram of the protons and electrons in each of the following: The ionic compounds lithium fluoride, LIF, and beryllium chloride, Becl2. Do I draw these 2 compounds separately, and I'm unsure of how.

48. ## chemistry

How do you think the density of ethanol would change if it were warmed to 50 degrees Celsius before you did the experm\iment?

49. ## algebra

-125x^3y-75xy^2+100x^3y^3 factor help i have used a number tree to get

50. ## chemistry

How many moles of lilthium chloride are dissolved in 3.00 L of a 0.200 M solution of lithium chloride?

51. ## Statistics

What are the major differences between pratical and statistical significance? Statistical significance means the oberved mean differences are not likely due to dimpling error. Practical significance looks at wether the difference is large enough to be of

52. ## math

Has the content in this course allowed you to think of math as a useful tool? If so, how? What concepts investigated in this course can apply to your personal and professional life? In what ways did you use MyMathLab® for extra support?

53. ## Economics

Explain how decision making, interaction and the workings of the economy influences the marginal benefits and marginal costs associated with the decision to purchase a house?

54. ## social studies

The task of economic policy is to create a prosperous America. The unfinished task of prosperous Americans is to build a Great Society. Our accomplishments have been many; these tasks remain unfinished: > to achieve full employment without inflation; > to

55. ## Math 117

Is this equation correct: (3 • x • y)4 = 81 • x • y ? Explain why. If it is correct, how can you prove this? If it is incorrect, what should be done to make it right?

56. ## computers

You have been hired as a consultant by your neighbor to help her with her computer. You notice that she has a screen full of icons which appear to be Word documents, Excel Spreadsheets and other graphic files. How would you help her organize her data i.e.

57. ## English Literature

I have to turn this paper in, would anyone be able to look at it for correct citation, I don't want to plagerise, it needs to be MLA format. It's a strange paper, we were asked to compare four stories to war. I don't think I did a good job, but this is all

58. ## finance

Is a fixed-price contract a good way to achieve the government’s goal of curbing rising costs

59. ## physics

A boulder weighs 800N at the surface of the earth. What would be its weight at a distance of three earth's radii from the center of the earth?

60. ## geometry

ABCD is similar to WXYZ ad equals 6, dc equals 3, and wz equals 59 find YZ

61. ## physics

what is the inverse square law equation?

62. ## algebra

solve te compound inequality 6 > -5x + 5 or 9 < - 3x + 4

63. ## Statistics

1. For the following exercise, complete the following by using the data sets below that provides the ages of the first seven presidents: a. Find the mean, median, and range for each of the two data sets. First 7: The mean is 58.3 The median is 57 The range

64. ## Statistics

First 7: 57 61 57 57 58 57 61 Second 7: 61 52 69 64 46 54 47 2. Any given data set consists of a set of numerical values. Please indicate by stating yes or no for each of the following statements whether or not it could be correct for any data set. (This

65. ## Stats

a. What are the values for TP, TN, FP, and FN for class value = 1? b. What are the sensitivity, specificity, and FPR for class value = 1? === Run information === Scheme: weka.classifiers.trees.J48 -C 0.25 -M 2 Relation: sattrn Instances: 4435 Attributes:

66. ## Statistics

What is the relationship between levels of confidence and statistical significance?

67. ## Chemistry

How did the metal atoms become ions? Metal atoms became ions by losing electrons to form positively charged ions(cations). How did the nonmetal atoms become ions? Nonmetal atoms became ions by gaining electrons to form negative ions(anions).

68. ## Statistics

What are the major differences between pratical and statistical significance? Statistical significance means the oberved mean differences are not likely due to dimpling error. Practical significance looks at wether the difference is large enough to be of

69. ## Math

From the vertex A of a right angled triangle ABC, (A being the right angle) AD is drawn perpendicular to BC. How do I prove that the three triangles ABD, ADC, and ABC are similar? Thank you!

70. ## Physics

While riding her bicycle, she goes from a full stop to 9m/s in 3 minutes. How fast is she acclerating?

71. ## chemistry

A box with a square base and no top is to be made from a square piece of carboard by cutting 7 in. squares from each corner and folding up the sides. The box is to hold 16128 in3. How big a piece of cardboard is needed? Your answer is ?in by ?in Ooops, I

72. ## algebra

solve by subsitution 6x + 5y = 27 x = 17 -8y my answer was (3,-7)

73. ## algebra

Soybean meal is 18% protein: corn meal is 9% proten. How many pounds of each sould be mixed together in order to get 360-pounds of mixture that is 14% protein? Soybean meal_______, Corn meal_______.

74. ## algebra

find the domain of the function g(x) = 4 ______ 6 - 7x

75. ## algebra

solve by multiplication -7/8x = -9/10

76. ## English

One possible method to begin an essay is A. to paraphrase B. to meditate C. to ask a question B, right? Thanks.

77. ## writing

Now that you have developed an in-text citation for a summary, paraphrase, and a direct quote, and created a reference of your chosen article, reflect on the thought processes you used for each aspect. How did your approach differ when writing each? What

This question is based upon differential calculus. Velocity of the particle is given by the equation: v = (2t^2+5)cm/s. Find:- (i) The change in velocity of the particle during the time interval t1 = 2s and t2 = 4s. (ii) Average acceleration during the

79. ## Spanish

What is the proper form? Nosotros (deber/estudiar)___ mucho esta semana. debemos/estudiamos or debemos/estudiar

80. ## Statistics

What are the major differences between pratical and statistical significance?

81. ## CHEMISTRY

1.0 mol of nitrogen oxide NO and 1.0 mol of oxygen were mixed in a container and heated to 450 oC. At equilibrium the number of moles of oxygen was found to be 0.70 mol. The total pressure in the vessel was 4.0 atm. Calculate the value of Kp for the

82. ## General Psychology

Compare and Contrast normal and abnormal psychology?

83. ## English

1. Where were you doing then? - I was taking a shower. 2. What were you doing then? - I was taking a shower. (Which question is right?)

84. ## algebra

find the domain of the function p(x) = x^2 - 2x + 10

85. ## algebra

graph the equation and identify the y-intrecept y + x = -9

Amy paid \$60.12 for a pair of running shoes that were 15% off. What was the regular price. I am coming up with 69.14 (round to nearest cent)

87. ## Math 117

Explain how to divide a polynomial by a binomial using an example. (Please refer to the post “How to post equations” in the Main Forum to post your response with correct equations/expressions showing.) Make sure you post the explanation as well as the

Trains A and B are traveling in the same direction on parallel tracks. Train A is traveling at 40mph, B is traveling at 44 mph. Train A passes a station at 820am, train B passes the same station at 850. At what time will train B catch up to train A. My

89. ## English

Can you please check if the following sentences are correct? I thank you very much in advance. 1) In the morning I usually make coffee for my parents and myself (?). Then I got washed and changed. 2) I usually take the child to the beach.I have to carry a

90. ## statistics

Assume the body weight of healthy fifth graders is normally distributed with a mean of 98.3 lbs and a standard deviation of 4.12 lbs. If you have a body weight of 89.3, what is your percentile score?

91. ## English

When submitting a final draft of a handwritten paper, which of the following choices is important to remember? A. The margins should be exactly even on left and right sides B. Write neatly and use black or blue ink C. Use a plain font, like Times New Roman

92. ## photography

how often do new pictures need to be takenof each model

93. ## Chemistry

Name one metal ion that's not multivalent. Hydrogen?

Fretta and her brother deucde to visit some friends near a house.they decide to travel along the road and go 250 m(W),360 m(W40degreesN), and then200 m(N).. we need to find :the resultant displacement. hi please help me with this, so far iv figured it out

95. ## physics

Fretta and her brother deucde to visit some friends near a house.they decide to travel along the road and go 250 m(W),360 m(W40degreesN), and then200 m(N).. we need to find :the resultant displacement. hi please help me with this, so far iv figured it out

asked by i NEED physics help asap!!!
96. ## US History II

Which one was the major turning point of 1968? I found: 1) assassination of Martin Luther Kinf Jr. 2) assassination of Robert !@#\$%^&ennedy Also...another question Which one was the major turning point of 1973? 1)the Paris Peace Agreement 2)the War-Powers

97. ## college

How do you find the answers to questions (research) using your computer? Provide an example.

98. ## algebra

solve 2x > 10

99. ## algebra

solve by elimiation 2r - 9s = -17 9r + 2s = 51

100. ## English

When doing a research, a current source is a useful one. T or F? I think it's T as a current one would give more accurate information. Thanks.

101. ## tax

I have two questions relating to taxes in 2 U.S. states. 1) Why is there no sales tax in Florida? 2) In Pennsylvania, why are these goods (ex. food, clothing, shoes) charge no tax?

102. ## US History II

Could someone please answer these questions, so I could use this as an example for the other quotes? "A house divided against itself cannot stand" 1) Source: Abraham Lincoln 2) In What context was it used: 3) Larger significance in illuminating a theme of

103. ## english

i need help with 2 finals due this sun? Hsm 210 and com220

104. ## religion

where can I locate information on the five pillars of islam by McInerney? It is difficult to trace this person down without a first name. Can anyone help?

105. ## English

Which of the following is an example of a focused topic for a research paper? A. Which skateboard manufacturer makes the best boards? B. Why everyone likes skateboard. C. All about skateboards. I know that Choice C is just wrong I would say A as it seems

106. ## English

To assure the Writing Process is complete, the author must A. revise B. project C. compile I would say it's A, right? Thanks for checking.

107. ## ETH/ 125

Write a fictional, first-person account of the creation and consequence situations of a subordinate group in the United States in the form of a 700- to 1,050-word journal entry. Describe, as if you were a member of that subordinate group, where the group

108. ## Trigonometry

Hi,how do I find both solutions of the equation cos41 = 0.35 between degrees 0 and 360? Many thanks

110. ## Algebra equation

Any advice on this one would be appreciated I have the equation x+3-1/x=0 and I have an answer of x = 0.30 (to 2 d.p.), I just need to know the steps to get there, Many thanks

111. ## social studies

National organizations such as the Bureau of Indian Affairs, the National Congress of American Indians, and the National Indian Gaming Association are dedicated to Native American affairs. What effect have these organizations had on reducing tribal poverty

112. ## math

Solve for t: Radical(t-108) - Radical(t+186) = 6 The only possible root is t = ?. It is an extraneous root.

114. ## chem121

a 6.13gsample of hydrocarbon occupied 5.ooL container at25 degree centigrade and 1.00 atm calculate the molar mass

115. ## CSC 111 Intruduction to Computer Science

What does it imply to pursue a computer science major in the 21st century?

116. ## Barney's Version analysis- English help

In the novel when Leo offers him to try out painting himself, what would be the significance of that? Once, when I was there, the two of us sharing a [smoke], he thrust his mop at me. "Have a go." he said. "Really?" " Why not?"

117. ## algebra

salve: y - 4 > -11

118. ## English

Which of the following choices is a strategy that can help speed up reading? A. external distractions B. Using a penor pencial as a pacer C. Use subvocalization I think both B and C are correct. But I could only choose one answer. What do you guys think

119. ## English

I sat proudly on Joe, my pinto, as we marched around the ring in the pony competition at the fairgrounds. I had worked nights for two years to get the money to buy him, worked hard to train him, and here we were. Th conclusion above is an example of: A.

120. ## Grammar

Which of the following choices is a run-on sentence? A. Take public transportation, it saves gas B. Join the army and see the world C. Why did the student body council vote to change the lunch time? D. It's a story night; it's a perfect time to watch

121. ## english

need help with tefl unit 6 the whole of it

122. ## math

calculate the unit price \$1.80 for 1.2 liters of juice

123. ## art history

how are principle of art related to elements of desing

124. ## Math

How do I know if the points (2,-15) lie on a parabola which has the equation y=x^2-6x-7?